205241887404 has 18 divisors (see below), whose sum is σ = 518805882140. Its totient is φ = 68413962456.

The previous prime is 205241887397. The next prime is 205241887421. The reversal of 205241887404 is 404788142502.

205241887404 is a `hidden beast` number, since 2 + 0 + 524 + 1 + 8 + 87 + 40 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 205241887404.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2850581734 + ... + 2850581805.

Almost surely, 2^205241887404 is an apocalyptic number.

It is an amenable number.

205241887404 is an abundant number, since it is smaller than the sum of its proper divisors (313563994736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205241887404 is a wasteful number, since it uses less digits than its factorization.

205241887404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5701163549 (or 5701163544 counting only the distinct ones).

The product of its (nonzero) digits is 573440, while the sum is 45.

The spelling of 205241887404 in words is "two hundred five billion, two hundred forty-one million, eight hundred eighty-seven thousand, four hundred four".